Sony KD-34XBR2 Training Manual page 76

QM BD.
VIDEO
5,6
U BD.
Procedure
Rerouting the HD video path is done from the service mode. The Q board must remain connected (CN8801 for
communications and CN7001 for power) for you to see the servicing mode OSD to make the change.
1. Enter the service mode (Display, 5, Volume +, Power On).
2. Select category " OP" (buttons 2 and 5).
3. Select item " HDPT" (buttons 1 and 4) (HDPT means High Definition Pass Through, item 5).
4. Change its data from 0 to 1.
Only a 1080i video input signal will display a picture because it solely has a 33.75kHz signal frequency that
matches the TV' s horizontal frequency of this Hi-Scan TV. All the other signal inputs must be converted by the
MID circuitry within the Q box (Q boards) to view. Chart 15-4 shows the horizontal frequency of the DTV formats
at the popular 60Hz Vertical frequency.
DTV
TUNER &
PROCESSOR
MID
PROCESS
COMPONENT
I/F
HD INPUTS
PASS-THROUGH
SERVICE MODE ENABLED
480p
720p
1080i
FIGURE 15-2 - HD VIDEO PATH
Chart 15-4 – Input signal H. Frequency
Input signal
Standard NTSC 480i
High Resolution 480p
High Resolution 720p
High Resolution 1080i
15. Convergence Adjustment Overview - HA-3 Chassis
OSD
IC002
SW.
HIGH DEF
B BD.
Horizontal Frequency
15,734 Hz
31.5kHz
45.kHz
33.75kHz
73
HD
PIX
RGB OUT
TO C BD.
Y/C
CRT DRIVE
A BD.
8/31/01
10TVP12 1328